{"id":6688,"date":"2026-06-19T01:20:53","date_gmt":"2026-06-19T01:20:53","guid":{"rendered":"https:\/\/materialparts.com\/ltc1966ims8\/"},"modified":"2026-06-19T01:20:53","modified_gmt":"2026-06-19T01:20:53","slug":"ltc1966ims8","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/ltc1966ims8\/","title":{"rendered":"LTC1966IMS8"},"content":{"rendered":"

Productos<\/h2>\n

The LTC1966IMS8 from Analog Devices is a precision micropower true RMS-to-DC converter using an innovative patented \u0394\u03a3 computational technique. With 0.1% gain accuracy, 0.02% linearity, and 155 \u00b5A supply current, it requires only one external averaging capacitor. Supporting single-ended or differential inputs with rail-to-rail common mode and 1VPEAK differential range, it achieves constant bandwidth independent of input voltage (800 kHz -3 dB) in a compact MSOP-8 package rated for -40\u00b0C to +85\u00b0C.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Funci\u00f3n<\/td>\nTrue RMS-to-DC Converter (\u0394\u03a3)<\/td>\n<\/tr>\n
Gain Accuracy<\/td>\n0.1% (50 Hz to 1 kHz)<\/td>\n<\/tr>\n
Total Error<\/td>\n0.25% (50 Hz to 1 kHz)<\/td>\n<\/tr>\n
Linearity<\/td>\n0.02%<\/td>\n<\/tr>\n
Bandwidth (-3 dB)<\/td>\n800 kHz typical<\/td>\n<\/tr>\n
Bandwidth (\u00b11%)<\/td>\n6 kHz typical<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n2.7V to 5.5V single, or up to \u00b15.5V dual<\/td>\n<\/tr>\n
Supply Current<\/td>\n155 \u00b5A typical, 170 \u00b5A max<\/td>\n<\/tr>\n
Shutdown Current<\/td>\n0.1 \u00b5A typical<\/td>\n<\/tr>\n
Input Common Mode<\/td>\nRail-to-rail<\/td>\n<\/tr>\n
Differential Input Range<\/td>\n1 VPEAK<\/td>\n<\/tr>\n
Crest Factor Support<\/td>\nUp to 4<\/td>\n<\/tr>\n
Salida<\/td>\nRail-to-rail with separate reference pin<\/td>\n<\/tr>\n
External Components<\/td>\n1 averaging capacitor (typically 1 \u00b5F)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +85\u00b0C (I grade)<\/td>\n<\/tr>\n
Paquete<\/td>\nMSOP-8 (3.0\u00d73.0 mm)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Patented \u0394\u03a3 RMS computation: simpler, more accurate, lower power than log-antilog<\/li>\n
  • 0.1% gain accuracy from 50 Hz to 1 kHz<\/li>\n
  • 0.02% linearity: allows simple single-point calibration<\/li>\n
  • Constant bandwidth independent of input voltage<\/li>\n
  • Only 1 external capacitor needed (averaging)<\/li>\n
  • Differential or single-ended input with rail-to-rail common mode<\/li>\n
  • Rail-to-rail output with separate reference pin for level shifting<\/li>\n
  • Ultra-low 0.1 \u00b5A shutdown current<\/li>\n
  • Insensitive to PCB soldering stress and temperature variations<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • True RMS digital multimeters and panel meters<\/li>\n
    • True RMS AC + DC measurement systems<\/li>\n
    • Audio amplitude measurement and level compression<\/li>\n
    • Precise AC voltage and current monitoring<\/li>\n
    • Portable battery-powered measurement instruments<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LTC1966IMS8 from Analog Devices is a precision micropower true RMS-to-DC converter using an innovative patented \u0394\u03a3 computational technique. With 0.1% gain accuracy, 0.02% linearity, and 155 \u00b5A supply current, it requires only one external averaging capacitor. Supporting single-ended or differential inputs with rail-to-rail common mode and 1VPEAK differential range, it achieves constant […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[178],"class_list":["post-6688","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-analog-devices"],"acf":{"brief_explanation":"\u0394\u03a3 RMS-to-DC converter, 0.1% accuracy, 155\u00b5A, MSOP-8","date_code":"","package_case":"MSOP-8 (3.0\u00d73.0\u00d70.85 mm, 0.65mm pitch)","in_stock":953,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/1966fb.pdf","price":"$3.89 @ 1ku","product_introduction":"The LTC1966IMS8 from Analog Devices is a precision micropower true RMS-to-DC converter using patented \u0394\u03a3 computational technique. With 0.1% gain accuracy, 0.02% linearity, 155 \u00b5A supply current, and only one external capacitor, it supports differential\/single-ended inputs with rail-to-rail common mode and 1VPEAK differential range. Its constant 800 kHz bandwidth and 0.1 \u00b5A shutdown in MSOP-8 make it ideal for true RMS multimeters, AC measurement, and portable instruments.","working_principle":"The LTC1966IMS8 uses an innovative patented delta-sigma (\u0394\u03a3) computational technique for RMS-to-DC conversion, fundamentally different from conventional log-antilog converters. The input signal is modulated by a delta-sigma modulator, which produces a 1-bit stream whose duty cycle is proportional to the square of the input voltage. This modulated signal is then fed to a switched-capacitor network that performs the squaring, averaging, and square-root operations in the digital domain. The external averaging capacitor (CAVE) low-pass filters the output to extract the DC RMS value. Because the \u0394\u03a3 computation is inherently linear, the 0.02% linearity allows simple single-point calibration at any input level \u2014 unlike log-antilog converters that require multi-point trimming. The bandwidth is constant and independent of input amplitude because the modulator operates at a fixed clock frequency. The differential input structure provides EMI\/RFI rejection, while the separate VOUTRTN pin allows flexible output level shifting for dual-supply or single-supply configurations.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>VDD<\/td>Power<\/td>Positive supply (2.7-5.5V)<\/td><\/tr>\n
      2<\/td>VIN2<\/td>Input<\/td>Differential input (inverting), or single-ended GND reference<\/td><\/tr>\n
      3<\/td>VIN1<\/td>Input<\/td>Differential input (non-inverting), or single-ended signal<\/td><\/tr>\n
      4<\/td>VSS<\/td>Power<\/td>Negative supply (GND for single supply, or -5.5V for dual)<\/td><\/tr>\n
      5<\/td>ENABLE<\/td>Input<\/td>Shutdown control (LOW=enabled, HIGH=shutdown, 0.1\u00b5A)<\/td><\/tr>\n
      6<\/td>OUTRTN<\/td>I\/O<\/td>Output return reference (for level shifting)<\/td><\/tr>\n
      7<\/td>CAVE<\/td>I\/O<\/td>Averaging capacitor connection (typically 1 \u00b5F to OUTRTN)<\/td><\/tr>\n
      8<\/td>VOUT<\/td>Output<\/td>RMS DC output voltage (rail-to-rail)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • True RMS digital multimeters and handheld measurement instruments<\/li>\n
      • True RMS AC + DC measurement for power monitoring<\/li>\n
      • Audio amplitude measurement and dynamic range compression<\/li>\n
      • Precise AC voltage and current monitoring in industrial systems<\/li>\n
      • Portable battery-powered RMS measurement devices<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        ADI<\/td>LTC1966CMS8<\/td>MSOP-8<\/td>Commercial grade (0-70\u00b0C)<\/td><\/tr>\n
        ADI<\/td>LTC1966HMS8<\/td>MSOP-8<\/td>Industrial grade (-40 to 125\u00b0C)<\/td><\/tr>\n
        ADI<\/td>LTC1967<\/td>MSOP-8<\/td>Higher bandwidth version (4 MHz -3dB)<\/td><\/tr>\n
        ADI<\/td>AD736<\/td>DIP-8\/SOIC-8<\/td>Traditional log-antilog RMS-DC, lower accuracy<\/td><\/tr>\n
        ADI<\/td>AD8436<\/td>TSSOP-20<\/td>Higher accuracy RMS-DC, \u0394\u03a3 architecture<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6688"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6688\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6688"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}